Price 5 10 15 20 26 30 35 40 45 50 65 60 65 Quantity par parked Refer to the graph above to answer this question. What is the effect of a price ceiling of $4? Select one: a. A surplus of 10 units. O b. A shortage of 5 units. O C. A surplus of 5 units. O d. A shortage of 10 units